Burner for oil-furnaces.



C. H. TRUE.

BURNER FOR OIL FURNAGES.

APPLIOATIONHLBD SEPT. 2. 1909.

l 90935564., Patented Apr. 14, 1914.

C. H. TRUE.

BURNER FOR OIL FURNAGES.

APPLICATION FILED snrT.2,'19o9.

* Patented Apr. 14, 1914.

2 SHEETS-SHEET 2.

CHARLES H. TRUE, OF CHICAGO,

ILLINOIS, ASSIGNOR @FFME TO THE RAILWAY MATERIALS COMPANY, OF CHICAGO,ILLINOIS, A CORPORATION OF ILLINOIS.

BURNER FOR OIL-FURNACES.

Loeaaea.

A To all whom t may concern.'

Be it known that I, CHARLES H. TRUE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Burners for Cil-Furnaces, ofwhich the following is a specification.

This invent-ion relates in general to burners for oil furnaces and moreparticularly .to burners which receive the fuel under pressure and hasfor its particular object to provide a burner of the type described foruse in portable rivet furnaces and the like,l

it being understood, however, that the burner is capable of 'wideapplication and is adaptable to furnaces of various types.

In the accompanying drawings Figure l is a front elevation of thefurnace. Fig. 2 is a side elevation. Fig. 3 is a vertical sectional view-throu h the heating chamber on the line 3-3 o Fig. 2. Fig. 4-is ahorizontal sectional view through the heating chamber on the line 4--4of Fig. 2. Fig. 5 is. a detail enlarged sectional view of the burner.Fig. 6 is a transverse sectional view of the burner on the line 6-6 ofFig. 5. Fig. 7 is-a detail view of the burner cap.

Referring to the drawings, 8 is a tank of suitable size and constructionfor containin a supply of fuel oil. This tank is supported in avframe 9which is mounted on two carrying wheels 10 and a swiveled steering wheel11. A furnace 12 lined with suitable fire brick 13 and comprising aheating chamber 14 is mounted on the frame 9 above the fuel tank. Thefurnace has an opening l5 at one end :and an opening 16 in one side. Theopening 16 is provided to permitthe insertion and removal of rivets orother articles from the heating chamber and to facilitate this operationthe furnace is provided with a shield 18 and a perforated air pipe 19 toprotect the workmen from the heat of the furnace. A tray 20 is mountedon the frame below the opening 16 in the furnace. vA burner is supportedon the frame opposite the opening 15 in the furnace and this burnercomprises a shell 21 provided with ears 22 which are bolted to thebracket arms 23 suitably fastened on the furnace or on the frame. Theshell 21 has an enlarged chamber 24, an opening 25 at one end and a'screwthreaded opening 26 at the other end (Fig. 5). The end of thechamber 24 adjacent the opening 25 is preferably tapered as at 25Specication of Letters IPatent.

-groove belng of greater width Patented Apr. 14, 1914.

l Application led September 2, 1909. Serial No. 515,836.

tube 27 is screw threaded in the opening 26 in the shell .and is securedin adjusted posi tion relative to the shell by a lock nut 28. Adeflector 29 is arranged in the outer end of the stem 27 and is securedtherein by a screw 30 passlng through the stem and entering an annulargroove 31 in the deflector, this than the screw to permit a limltedlongitudinal movement ofthe deiector relative to the stem. The parts'areconstructed so that the screw will not .bind the deflector and thereforethe latter 1s capable of a rotary movement as well as a longitudinalmovement in the stem. Longitudmal grooves 32 are provided in thedeflector to facilitate the passage of oil, although the deflector doesnot fit snugly in the stem and oil may escape around it as well asthrough the grooves. The head 33 of the deflector is of larger' diameterthan the diameter of the outer or discharge end 34 of the stem. Thedeflector is tapered or conical shaped at 35v to fit in the tapered orconical shaped discharge end 34 of the stem.

An air pipe 36 connected to a source of com-pressed air supply isconnected to a T 37 which is provided with a globe valve 38. A pipe 39is connected to the T 37 and to the top of the tank at 40. Another pipe41 is also connected to the top of the tank at to enable the tank to befilled with oil, and this pipe'has a removable screw cap 42 at its outerend. The burner shell has a nipple 43 which communicates with thechamber 24 and a pipe 44 is connected to the T 37 and to said nipple.The perforated air pipe 19 is connected to the pipe 39. An oil pipe 45is connected to the tank at or adjacent to the bottom thereof and to thehollow stem 27 of the burner. This oil ipe is provided with a valve 46to shut 01T t e flow of oil from the burner.

The frame and carrying wheels constitute a truck on which the furnaceand oil supply tank are supported and this truck is preferably rovidedwith handles 47 of any suitable character to facilitate moving the truckabout.

In practice the valve 38 is opened and air isuadmitted from the supplythrough pipe 36. A part of the air will pass down through pipe 39 intothe oil tank and force 'the oilvoutof the bottom of the tank and uplthrough the pipe 45 into the hollow oil stem i of the burner at the rearend thereof and out at the front end thereof beneath the head 35 of thedelector. Some of the air passes through the pipe 44 and nipple 43 intothe air chamber 24 of the burner. The chamber is of suiicient size topermit the air to expand therein and this air escapes from the burnerthrough the opening 25 and in combination with the oil which issues in athin lm around the head35 of the d eflector. As the air escapes throughthe opening 25 it is diverted toward the deflector 29 as it passes overthe inclined surface 25 and the deiector 29 diverts it again outwardlyfrom its longitudinal center in all directions.

The air is thns thrust forcibly across the di-v rection of travel of thefuel and then continues with it so that the fuel and air leave theburner alongsubstantially the same path. The 'result of this forciblecontact of the air with the thin lm of oil escaping between the tapereddeflector and the tapered discharge end of the hollow stern' is toatomize the oil at the discharge end of the burner and this promotesperfect combustion, and as the oil in leaving the burner travels withthe air no opportunity'is provided for unburned oil to pass across themoving air and fall unvaporized and unburned outside the furnace. A partof the air passes through pipe 39 into pipe 19 and issues in jets infront ofthe door opening 16 of the furnace to protect the operator fromthe intense heat of the furnace.

Furnaces heretofore generally in use for heating rivets and other smallarticles have been so constructed that they must be bodily lifted fromthe ground or floor when a shifting of position was desired, making itimpossible for one manto operate them; and they have required a highdegree of air pressure, from eighty to. ninety pounds, to operate them,rendering them both dangerous and noisy. They have been objectionablefor the reason that they can not -be readily moved about, and this isespecially im portant because these furnaces are usually operated by bos; because they have proven too heavy a equipment of the shop 'in whichthey are used, which makes them very expensive to operate; and becausethey are too noisy in operation. My invention entirely overcomes theseobjections for the reason that -it is light in weight and can be easilymoved about by a boy; it can be operated from an air line pressure aslow as fifteen or twenty pounds per square Iinch and requires veryllittle air in its operation; and because the noise ofl operation isreduced toa minimum. The furnace is light iny construction and it is sobalanced that it can be easily pushed or pulled about to any positioninl a shop. The vconstruction of t e apparatus is such rain on thecompressed a1r` that the supply of oil is controlled by the pressure ofthe air and only as much oil will escape around the head of thedefiector as the air escaping .from the chamber 24 is capable ofeifectually atomizing. This insures the delivery of the oil in theproper condition for perfect combustion and avoids dripping from theburner. The construction of parts and particularly of the burner withoutsharp edges andI corners is s uch that violent mechanical re-actionswhen the oil is atomized are entirely avoided and thereby the noise whenthe furnace is in operation is reduced to a' minimum. The flow of,.oilto the burnerdepends upon the air pressure admitted to the tank and isregulated and controlled entirely by this air pressure. When thepressure is applied the oill begins to flow and just as soon as thepressure is shut off from the 'tank the oil stops flowing to the burner.In this' way I avoid regulating the feed of oil at the burner andcontrol it entirely and automatically by the air pressure whichV isutilized not only for the purpose of inducing a flow of oil but 3for thepurpose of atomizing the oil and providing the Aairv jet in 'front ofthe furnace door. Therefore when the airis shut off from the valve 38 Ior if vthel air pressure fails for any reason the flow of oil stops` foras the oil in the pipe 27 recedes into the tank the defiector 35 is wdrawn against the seat 34 by suction created by the receding oil.'Therefore there can b e no leakage of oil at the burner.

While my invention is designed, prima-l rily, for heating rivets it mayalso be used for heating other small articles in the same manner andl donot wish to be understood as limiting myself to any particular. use ofthe furnace. Y

The deflector is movably secured in the stem of theburn'er so that itwill not vstick and prevent the escape of oil from the stem.

If the detlector were fastened rigidly in the stem the space between thedeflector and the stem vat the discharge end of the stem might f becomestopped up or might be accidentally adjusted so that it would revent thefree egress of oil. By making t e deflector lon.

itudinally movable relative to the stem the eflector can adjustv itselfto permit the free passage of the oil. j,

What vI claim and desire tosecure by Letters Patent is: 1. A. burner foran pil furnace comprisin a compressed air chamber having inlet andoutlet openings, a fuel delivery tube dis'-v posed through said chamberand .having an open end disposed adjacent to and centrally of saidoutlet opening, adeector having a stem, disposed in sadtube and freelymovable longitudinally thereof, and 'means disposed through said tubefor limiting the longitudinal movement of said deiector.

2. A burner for an oil 'furnace comprising a compressed airchambervhaving inlet and outlet openings, a fuel delivery tube disposedthrough said chamber and having an open end disposed adjacent to andcentrally of said outlet opening, and a deflector having a stem disposedin said tube and a 4rusto-conical head disposed adjacent the end of saidtube, said head and stem being provided with grooves extendinglongitudinally thereof from points intermediate of the ends of said headthroughout the lengthI of the said stem.

3. A burner for an oil furnace comprising a compressed air chamberhaving inlet and outlet openings, a fuel delivery tube disposed throughsaid chamber `and having an open end disposed adjacent to and centrallyof said outlet opening, a deflector having a stem disposed in said tubeand freely movable longitudinally thereof, and means disposed throughsaid tube forlimiting the longitudinal movement of said deiector, saiddeflector being disposed partly Within the open end of said tube andpartly within said outlet opening of the said chamber CHARLES H. TRUE.Witnesses:

WM. F. BELT, i M. A. KIDDm.

. Without said tube.

